Post production audio clean up of a 22 minute video soundtrack.

I have a produced a probate mediation video intended for marketing and training. The 22 minute video has a number of problems with the sound track and it needs cleaning up. Issues that are obvious to me - scene 1 microphone knocking sound; scene 4 microphone knocking and echo; scene 6 echo microphone knocking; scene 7 echo and rustling of clothes (scene opening) + any other improvements the freelancer can identify.

The video can be viewed at https://www.youtube.com/watch?v=rsNqS3SxOcE&feature=youtu.be